function String.prototype.Trim() {return this.replace(/(^\s*)|(\s*$)/g,"");}
function String.prototype.Ltrim(){return this.replace(/(^\s*)/g, "");}
function String.prototype.Rtrim(){return this.replace(/(\s*$)/g, "");}

function Trim_char(obj)
{
  var str=obj.value.Trim();
  obj.value=str;
  }

function check(form)
		{
//		   alert("dfdf");
		if (form.txtname.value==""||form.txtname.value.Trim()=="")
		   {
                   window.lblmsg.innerHTML="请输入您的称呼...";
                   form.txtname.style.border="3px solid #4682B4";
                   form.txtname.value="";
		   form.txtname.focus();
		   return false;
		   }
               if (form.txtemail.value==""||form.txtemail.value.Trim()=="")
		   {
		   form.txtemail.style.border="3px solid #4682B4";
                   form.txtemail.value='';
		   form.txtemail.focus();
		   window.lblmsg.innerHTML="请输入您的联系方式...";
		   return false;
		   }
		 if (form.txtcontent.value==""||form.txtcontent.value.Trim()=="")
// 		if (form.txtcontent.value=="")
		   {
		   form.txtcontent.style.border="3px solid #4682B4";
                   form.txtcontent.value='';
		   form.txtcontent.focus();
		   window.lblmsg.innerHTML="请输入您的留言信息...";
		   return false;
		   }
              if (getLength(form.txtcontent.value) > 201)
                 {
                     alert(getLength(form.txtcontent.value)+"留言信息字数应小于100！");
                     form.txtcontent.focus();
                     return (false);
                  }
                  return true
        }

  //验证空字符
 function isblankStr(input)
{   var str = " ";
    var temp;
    var j=0;
    for (var i = 0; i < input.length; i++ )
    {
        temp = input.substring(i,i+1);
        if(str!=temp)
        {
            j++;
        }
    }
    if (j>0)return(false);
    else return (true);
}

//字符长度
 // Writen by stiven0 ,2006-03-09
function  getLength(stringIn)
{
        var   strLength=0;
        for(var   i=0;i<stringIn.length;i++)
        {
                if(stringIn.charCodeAt(i)>255)
                {
                        strLength+=2;
                }
                else
                {
                        strLength+=1;
                }

        }
        return   strLength;
}