var dom = (document.getElementsByTagName) ? true : false;
var ie5 = (document.getElementsByTagName && document.all) ? true : false;
var arrowUp, arrowDown;

if (ie5 || dom)
	initSortTable();

function initSortTable() {
	arrowUp = document.createElement("SPAN");
	var tn = document.createTextNode("↓");
	arrowUp.appendChild(tn);
	arrowUp.className = "arrow";
	arrowDown = document.createElement("SPAN");
	tn = document.createTextNode("↑");
	arrowDown.appendChild(tn);
	arrowDown.className = "arrow";
}

function sortTable(tableNode, nCol, bDesc, sType) {
	var tBody = tableNode.tBodies[0];
	var trs = tBody.rows;
	var a = new Array();

	for (var i=0; i<trs.length; i++) {
		a[i] = trs[i];
	}

	a.sort(compareByColumn(nCol,bDesc,sType));

	for (var ii=0; ii<a.length; ii++) {
		tBody.appendChild(a[ii]);
	}
}

function CaseInsensitiveString(s) {
	return String(s).toUpperCase();
}

function parseDate(s) {
	return Date.parse(s.replace(/\-/g, '/'));
}

function toNumber(s) {
    return Number(s.replace(/[^0-9\.]/g, ""));
}

function compareByColumn(nCol, bDescending, sType) {
	var c = nCol;
	var d = bDescending;
	var fTypeCast = String;

	if (sType == "Number")
		fTypeCast = Number;
	else if (sType == "Date")
		fTypeCast = parseDate;
	else if (sType == "CaseInsensitiveString")
		fTypeCast = CaseInsensitiveString;
	
    return function (n1, n2) {
	    if (fTypeCast(FormatString(getInnerText(n1.cells[c]),"string")) < fTypeCast(FormatString(getInnerText(n2.cells[c]),"string")))
		    return d ? -1 : +1;
	    if (fTypeCast(FormatString(getInnerText(n1.cells[c]),"string")) > fTypeCast(FormatString(getInnerText(n2.cells[c]),"string")))
		    return d ? +1 : -1;
	    return 0;
    };
}

function sortColumn(e) {
	var tmp, el, tHeadParent;
	if (ie5)
		tmp = e.srcElement;
	else if (dom)
		tmp = e.target;
	tHeadParent = getParent(tmp, "THEAD");
	el = getParent(tmp, "th");
	if (tHeadParent == null)
		return;

	if (el != null) {
		var p = el.parentNode;
		var i;
		if (el._descending) // catch the null
		el._descending = false;
		else
		el._descending = true;

		if (tHeadParent.arrow != null) {
			if (tHeadParent.arrow.parentNode != el) {
				tHeadParent.arrow.parentNode._descending = null;   
			}
			tHeadParent.arrow.parentNode.removeChild(tHeadParent.arrow);
		}
		if (el._descending)
			tHeadParent.arrow = arrowDown.cloneNode(true);
		else
			tHeadParent.arrow = arrowUp.cloneNode(true);
		el.appendChild(tHeadParent.arrow);

		// get the index of the td
		for (i=0; i<p.cells.length; i++) {
			if (p.cells[i] == el) break;
		}
		var table = getParent(el, "TABLE");
		// can't fail
        sortTable(table,i,el._descending, el.getAttribute("type"));
	}
}

function getInnerText(el) {
	if (ie5) return el.innerText; //Not needed but it is faster

	var str = "";

	for (var i=0; i<el.childNodes.length; i++) {
		switch (el.childNodes.item(i).nodeType) {
			case 1: //ELEMENT_NODE
				str += getInnerText(el.childNodes.item(i));
				break;
			case 3: //TEXT_NODE
				str += el.childNodes.item(i).nodeValue;
				break;
		}
	}
	return str;
}

function getParent(el, pTagName) {
	if (el == null) return null;
	else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase())
		return el;
	else
		return getParent(el.parentNode, pTagName);
}

function FormatString(string1,stringtype)
{
    string1=string1.replace(/第/g,"").replace(/种方案 /g,"");
   if(stringtype=="string")
    {
        zimu=string1.substring(0,1);
        var zimutemp="";
        if(string1.indexOf("/")>0)
        {
            zimutemp=string1.substring(1,string1.indexOf("/"));
        }
        else
        {
            zimutemp=string1.substring(1,string1.length);
        }
        
        if(zimu=="k" | zimu=="K" | zimu=="n" | zimu=="N"| zimu=="t" | zimu=="T" | zimu=="z" | zimu=="Z" | zimu=="c" | zimu=="C" | zimu=="d" | zimu=="D" | zimu=="l" | zimu=="L" | zimu=="y" | zimu=="Y" )
        {
            var zimutemp_1="";
            switch (zimutemp.length)
            {
               case 1:
               zimutemp_1="0000"+zimutemp;
               break;
               case 2:
               zimutemp_1="000"+zimutemp;
               break;
               case 3:
               zimutemp_1="00"+zimutemp;
               break;
               case 4:
               zimutemp_1="0"+zimutemp;
               break;
               case 5:
               zimutemp_1=zimutemp;
               break;
               default:
               zimutemp_1=zimutemp;
               break;
            }
            string1=zimu+zimutemp_1;
            zimutemp_1="";
        }
        else
        {
            //如果是数字
            if(!isNaN(string1.substring(0,1)))
            {
                var zimutemp_2="";
                switch (string1.length)
                {
                   case 1:
                   zimutemp_2="0000"+string1;
                   break;
                   case 2:
                   zimutemp_2="000"+string1;
                   break;
                   case 3:
                   zimutemp_2="00"+string1;
                   break;
                   case 4:
                   zimutemp_2="0"+string1;
                   break;
                   case 5:
                   zimutemp_2=string1;
                   break;
                   default:
                   zimutemp_2=string1;
                   break;
                }
                string1=zimutemp_2;
            }
            //如果不是数字
            else
            {
                string1=escape(string1)
            }
        }
    }
    return string1;
}