JS去掉空格问题
原代码是: 
 function   getlengthB(str) 
 {   return   str.replace(/[ "    "^\x00-\xff\]/g, " ").length; 
 } 
 function   Checkdata() 
 { 
 	document.getElementById( "titlestr ").innerHTML= " "; 
 	document.getElementById( "constr ").innerHTML= " ";                        
 	ischeck=true 
                         CheckUbbUse( 'UserName ',1,document.getElementById( 'Body ').value)	//定员帖检查 
 	if   (getlengthB(document.Dvform.topic.value) <3   &&   ispostnew==1) 
 	{ 
 		document.getElementById( "titlestr ").innerHTML= "    <font   color=\ "#FF0000\ "> ←您忘记填写标题 </font>  " 
 		document.Dvform.topic.focus(); 
 		ischeck=false 
 	} 
 想在getlengthB函数中增加去掉空格的命令
------解决方案--------------------function getlengthB(str) 
 { 
 str = str.replace(/\s/g, " "); 
 return str.replace(/[ "  "^\x00-\xff\]/g, " ").length; 
 }
------解决方案--------------------  function getlengthB(str) 
 {  
 return str.replace(/[ "  "^\x00-\xff\]/g, " ").length; 
 }   
 String.prototype.trim = function() { 
  return this.replace(/(^\s*)|(\s*$)/g,  " ");   // 用正则表达式将前后空格 
 }