if(!Array.prototype.push)
	{
		Array.prototype.push=function()
		{
			var startLength=this.length;
			for(var i=0;i<arguments.length;i++)
			{
			    this[startLength+i]=arguments[i];
			}
			return this.length
		}
	};
	
   function G()
   {
	      var elements=new Array();
		  for(var i=0;i<arguments.length;i++)
		  {
			  var element=arguments[i];
			  if(typeof element=='string')
			  {
			      element=document.getElementById(element);
			  }
			  if(arguments.length==1)
			  {
	              return element;		  
			  }
			  elements.push(element)
		   };
		   return elements
	};

   //验证输入的是不是数字
   function IsDigit()
   {
       return   ((event.keyCode >= 48) && (event.keyCode <= 57));
   }
   
   //验证电子邮件
   function ismail(mail)
   {
      return(new RegExp(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/).test(mail));
   }
   
    //
    function shuru()
    {
        if ( !(((window.event.keyCode >= 48) && (window.event.keyCode <= 57)) || (window.event.keyCode == 13) || (window.event.keyCode == 46) || (window.event.keyCode == 45)))
        {
             window.event.keyCode = 0 ;
        }
    }