function FormatNumber(srcStr,nAfterDot){
		var srcStr,nAfterDot;
		var resultStr,nTen;
		srcStr = ""+srcStr+"";
		strLen = srcStr.length;
		dotPos = srcStr.indexOf(".",0);
		if (dotPos == -1){
				resultStr = srcStr+".";
				for (i=0;i<nAfterDot;i++){
						resultStr = resultStr+"0";
				}
				return resultStr;
		}
		else{
				if ((strLen - dotPos - 1) >= nAfterDot){
						nAfter = dotPos + nAfterDot + 1;
						nTen =1;
						for(j=0;j<nAfterDot;j++){
								nTen = nTen*10;
						}
						resultStr = Math.round(parseFloat(srcStr)*nTen)/nTen;
						return resultStr;
				}
				else{
						resultStr = srcStr;
						for (i=0;i<(nAfterDot - strLen + dotPos + 1);i++){
								resultStr = resultStr+"0";
						}
						return resultStr;
				}
		}
}