// JavaScript Document
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_goToURL() { //v3.0
  var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
}

function MM_changeProp(objName,x,theProp,theValue) { //v6.0
  var obj = MM_findObj(objName);
  if (obj && (theProp.indexOf("style.")==-1 || obj.style)){
    if (theValue == true || theValue == false)
      eval("obj."+theProp+"="+theValue);
    else eval("obj."+theProp+"='"+theValue+"'");
  }
}

// validates that the field value string has one or more characters in it
function isNotEmpty(elem) {
    var str = elem.value;
    var re = /.+/;
    if(!str.match(re)) {
        return false;
    } else {
        return true;
    }
}
   
//validates that the entry is a positive or negative number
function isNumber(elem) {
    var str = elem.value;
    var re = /^[-]?\d*\.?\d*$/;
    str = str.toString( );
    if (!str.match(re)) {
        alert("请确认您所输入的内容只能包含数字。");
        return false;
    }
    return true;
}
   
// validates that the entry is 16 characters long when
// input field's maxlength attribute is set to 16
function isLen16(elem) {
    var str = elem.value;
    var re = /\b.{16}\b/;
    if (!str.match(re)) {
        alert("Entry does not contain the required 16 characters.");
        return false;
    } else {
        return true;
    }
}
   
// validates that the entry is formatted as an email address
function isEMailAddr(elem) {
    var s = elem.value;
    if (s.length > 100){
		window.alert("email地址长度不能超过100位!");
		return false;
	}

	var regu = /^(([0-9a-zA-Z]+)|([0-9a-zA-Z]+[_.0-9a-zA-Z-]*[0-9a-zA-Z]+))@([a-zA-Z0-9-]+[.])+([a-zA-Z]{2}|net|NET|com|COM|gov|GOV|mil|MIL|org|ORG|edu|EDU|int|INT)$/;
	var re = new RegExp(regu);
	if (s.search(re) != -1) {
		return true;
	}
	else {
		alert("请再次确认您所输入的Email地址");
		return false;
	}
}

function Jtrim(str){
	var i = 0;
	var len = str.length;
	if ( str == "" ) return( str );
	j = len -1;
	flagbegin = true;
	flagend = true;
	while ( flagbegin == true && i< len) {
		if ( str.charAt(i) == " " ) {
			i=i+1;
			flagbegin=true;
		}
	    else{
	          flagbegin=false;
	    }
	}

	while  (flagend== true && j>=0) {
	    if (str.charAt(j)==" "){
			j=j-1;
			flagend=true;
	    }
	    else {
			flagend=false;
		}
	}

	if ( i > j ) return ("")
	trimstr = str.substring(i,j+1);
	return trimstr;
}

function numletterOnly(evt) {
    evt = (evt) ? evt : event;
    var charCode = (evt.charCode) ? evt.charCode : ((evt.keyCode) ? evt.keyCode : 
        ((evt.which) ? evt.which : 0));
	//alert("charCode = "+charCode);
	if (charCode > 31 && (charCode < 48 || charCode > 57) && (charCode < 65 || charCode > 90) && (charCode < 97 || charCode > 122) && charCode != 46){
        alert("请输入数字或者字母。");
        return false;
    }
    return true;
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
function ShowHidden_Click(a,b){
	if(document.getElementById(b).style.display=="block"){
		document.getElementById(b).style.display="none";
		document.getElementById(a).style.display="block";
	}
	else{
		document.getElementById(b).style.display="block";//显示
		document.getElementById(a).style.display="none";
	}
}

function addLoadEvent(func){
	var oldonload = window.onload;
	if(typeof window.onload !='function'){
		window.onload = func;
	}else{
		window.onload = function(){
		oldonload();
		func();
		}
	}
}