function getLeftChars(varField)
	 {
	    var i = 0;
	    var counter = 0;
	    var cap = 255;
	       
	    var leftchars = cap - varField.value.length;    
	    
	    return (leftchars);
	 }

	function onCharsChange(varField)
	{
	     var leftChars = getLeftChars(varField);
	     if ( leftChars >= 0)
	     {
		charsmonitor.innerText = leftChars;	
			return true;
	     } 
	     else
	     {
		charsmonitor.innerText="0";
		window.alert("超了！！！！太多了！！！！你只能输入255个汉字！！");
		
		var len = document.getElementById("Content").value.length + leftChars; 	
			document.getElementById("Content").value = document.getElementById("Content").value.substring(0, len);
			leftChars = getLeftChars(document.getElementById("Content"));
			 if ( leftChars >= 0) {
				charsmonitor.innerText=leftChars;
			}
		return false;
	    }
	}
	
	//CheckBox 全选
function SelectAllCheckBox() 
{
  var b=false;
  if(document.getElementById("selall").checked)
  {
      b=true;
  }
  var objs = document.getElementsByTagName("input");
  for(var i=0; i<objs.length; i++) {
    if(objs[i].type.toLowerCase() == "checkbox" )
      objs[i].checked = b;
  }
}