var isIe=(document.all)?true:false; 
function mousePosition(ev) 
 { 
	if(ev.pageX || ev.pageY) 
	{ 
		return {
			x:ev.pageX, y:ev.pageY
		}; 
	}
	return { 
		x:ev.clientX + document.body.scrollLeft - document.body.clientLeft,y:ev.clientY + document.body.scrollTop - document.body.clientTop 
	}; 
 } 
//弹出方法 
function showMessageBox(wTitle,content,pos,wWidth) 
{ 
	 closeWindow(); 
	if(document.body.scrollHeight<=window.screen.Height){
		 var bWidth=parseInt(window.screen.Width); 
		 var bHeight=parseInt(window.screen.Height); 
	}else{
		 var bWidth=parseInt(document.body.scrollWidth); 
		 var bHeight=parseInt(document.body.scrollHeight); 
	}

	 var back=document.createElement("div"); 
	 back.id="back"; 
	 var styleStr="top:0px;left:0px;position:absolute;background:#000;width:"+bWidth+"px;height:"+bHeight+"px;"; 
	 styleStr+=(isIe)?"filter:alpha(opacity=0);":"opacity:0;"; 
	 back.style.cssText=styleStr; 
	 document.body.appendChild(back); 
	 showBackground(back,50); 
	 var mesW=document.createElement("div"); 
	 mesW.id="mesWindow"; 
	 mesW.className="mesWindow"; 
	 mesW.innerHTML="<div class='mesWindowTop'><table width='100%' height='100%'><tr><td>"+wTitle+"</td><td style='width:1px;'><input type='button' onclick='closeWindow();' title='关闭窗口' class='close' value='关闭' /></td></tr></table></div><div class='mesWindowContent' id='mesWindowContent'>"+content+"</div><div class='mesWindowBottom'></div>"; 
 
 	styleStr="left:"+(((pos.x-wWidth)>0)?(pos.x-wWidth):pos.x)+"px;top:"+(pos.y)+"px;position:absolute;width:"+wWidth+"px;"; 
	 mesW.style.cssText=styleStr; 
 	document.body.appendChild(mesW); 
} 
//让背景渐渐变暗 
 function showBackground(obj,endInt) 
{ 
	if(isIe) 
 	{ 
 		obj.filters.alpha.opacity+=5; //变暗的速度
 		if(obj.filters.alpha.opacity<endInt) 
 		{ 
 			setTimeout(function(){showBackground(obj,endInt)},5); 
 		} 
 	}else{ 
 		var al=parseFloat(obj.style.opacity);al+=0.01; 
 		obj.style.opacity=al; 
 		if(al<(endInt/100)) 
 		{
			setTimeout(function(){showBackground(obj,endInt)},5);
		} 
 	} 
} 
//关闭窗口 
function closeWindow() 
{ 
 	if(document.getElementById('back')!=null) 
 	{ 
 		document.getElementById('back').parentNode.removeChild(document.getElementById('back')); 
 	} 
 	if(document.getElementById('mesWindow')!=null) 
 	{ 
 		document.getElementById('mesWindow').parentNode.removeChild(document.getElementById('mesWindow')); 
 	} 
} 
//测试弹出 
function testMessageBox(ev,obj,from_url) 
{ 
	var objPos = mousePosition(ev);
	var ab = document.getElementById(obj);
	document.forms['enter_form'].action = from_url;
	messContent = ab.innerHTML;
	showMessageBox('将此次店招投票告诉您的朋友',messContent,objPos,600); 
} 



function  CheckForm(obj)   
{     
	var ts = /^([A-Za-z0-9\.\-\_]+)(\w)+@(\w+\.)+(com|com\.cn|net|cn|net\.cn|org|biz|info|com\.tw|gov|gov\.cn|edu|edu\.cn)/;
	
	if(obj.pass_friend_name.value.length  ==  0) 
	{     
		alert("请输入您朋友的姓名!");   
		obj.pass_friend_name.focus();   
		return  false;   
	}
	if(obj.pass_your_name.value.length  ==  0) 
	{     
		alert("请输入您姓名!");   
		obj.pass_your_name.focus();   
		return  false;   
	}   
	if(obj.pass_email.value.length  ==  0) 
	{     
		alert("请输入你朋友的邮箱!");   
		obj.pass_email.focus();   
		return  false;   
	}  

	if(!ts.test(obj.pass_email.value))
	{
		alert("邮箱格式错误!");   
		obj.pass_email.focus();   
		return  false;  
	}   
	return  true;   
}