//登录验证
function frmsubmit(){
	if(trimall(document.frm.userlogin.value).length==0){
		document.frm.userlogin.focus();
		alert("请输入用户名");
		return false;
	}
	if(trimall(document.frm.userpasswd.value).length==0){
		document.frm.userpasswd.focus();
		alert("请输入密码");
		return false;
	}
	if(document.getelementbyid("register_tr1").style.display=="" &&  document.frm.registercode.value.length !=4){
		document.frm.registercode.focus();
		alert("请输入4位验证码");
		return false ;
	}
	document.getelementbyid("frm").submit();
}
//年龄校验
function isage(age){if(age==null || age=="") return true;return (!validate(age,'intege1')||age.length>3)?false:true;}
//名字校验
function isfullname(fullname){if(fullname==null || fullname=="")return true;return (!validate(fullname,'notempty') || fullname.length>10)?false:true;}
//控制描述的长度
var oldvalue=new array();
function checkmaxlen(obj,maxlength,num){
	if(obj.value==undefined){//div
		if(obj.innerhtml.length>maxlength){
			obj.innerhtml=oldvalue[num];
		}else{
			oldvalue[num]=obj.innerhtml;
		}
	}else{//input
		if(obj.value.length>maxlength){
			obj.value=oldvalue[num];
		}else{
			oldvalue[num]=obj.value;
		}
	}
}
//function isattach(file,imagefileextend,isalert){
//	//if(imagefileextend==null || imagefileextend.length<2)//未设置类型，验证常见类型
//		//imagefileextend = ".doc,.txt,.rar,.jpg,.gif,.bmp,.xls"; 
//		var  alertmsg = imagefileextend;
//		imagefileextend = (","+imagefileextend+",").replace(/,/g, "|");
//	 if(file.value.length>0){
//		 var fileextend=file.value.substring(file.value.lastindexof('.')).tolowercase();        
//		 if(imagefileextend.indexof("|"+fileextend+"|") != -1){   
//			 return true;
//		 }else{
//			 if(isalert){
//				 alert("附件格式错误，请上传" + alertmsg + "格式的附件");
//			 }
//			return false;
//		 }    
//	 } 
//	 return true;
//}
function validateforfront(str,model){
	if(str=="") return true;
	if(model=="fullname"){
		return isfullname(str);
	}
	if(model=="age"){
		return isage(str);
	}
	return validate(str,model);
}
function onlynum(evt){   
	if(evt==null){
	   evt=window.event;
	}
	var keycode = evt.keycode;   //取得键盘码
	var realkey = string.fromcharcode(keycode);    //以键盘码转成键盘符号
	if(keycode==8 ||keycode==9 || keycode==46|| (keycode>=35 && keycode<=40)||(keycode>=96 && keycode<=105))
		return;   
	else if(!/\d/.test(realkey)){
		if(navigator.appname=="netscape"){//区分浏览器种类
			evt.preventdefault();
			 return false; 
		}else{
		   window.event.returnvalue = false;
		}
	}
}
function disable(obj) {
    if (obj.type == null) {
        return;
    }
    if (obj.type == 'reset' || obj.type == 'submit') {
        obj.disabled = true;
    }
	// else if (obj.onclick != null) {
    //     obj.onclick = '';
    // }
	else if (obj.onchange != null) {
        obj.onchange = '';
    } else if (obj.href != null && (obj.rel == null || obj.rel != 'stylesheet')) {
        obj.disabled = true;
        obj.href = '#';
    }
    return;
}
function disabledallelements(){
	var objs = document.getelementsbytagname("*");
	for(i=0;i<objs.length;i++){
		disable(objs[i]);
	}
}
string.prototype.trim = function() { return this.replace(/(^\s*)|(\s*$)/g, ""); };

function assignfield(id){
	document.getelementbyid("hidd_" + id).value=document.getelementbyid(id).innerhtml.trim();
}

function trimall(text){
	return lefttrim(righttrim(text));
}

function lefttrim(text){
	if(text==null || text=="") return text;
	var leftindex=0;
	while(
		text.substring(leftindex,leftindex+1)==" "){
	    leftindex++;
	}
	return text.substring(leftindex,text.length);
}

function righttrim(text){
	if(text==null || text=="") return text;
	var rightindex=text.length;
	while(text.substring(rightindex-1,rightindex)==" "){
	    rightindex--;
	}
	return text.substring(0,rightindex);
}

//验证email
function ismail(mail) {
	return (new regexp(
			/^\w+((-\w+)|(\.\w+))*\@[a-za-z0-9]+((\.|-)[a-za-z0-9]+)*\.[a-za-z0-9]+$/)
			.test(mail));
}

function strdatetime(str) {
	var r = str.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
	if (r == null)
		return false;
	var d = new date(r[1], r[3] - 1, r[4]);
	return (d.getfullyear() == r[1] && (d.getmonth() + 1) == r[3] && d
			.getdate() == r[4]);
}