//截取字符串 包含中文处理 
			//(串,长度,增加...) 


			jQuery(function($){
				var jqhtml=$('.jsstrcut').each(function(){
					var sub=subString(this.innerHTML,20,4);
					this.innerHTML=sub;
				});
			});
			function subString(str, len, hasDot) 
			{ 
			    var newLength = 0; 
			    var newStr = ""; 
			    var chineseRegex = /[^\x00-\xff]/g; 
			    var singleChar = ""; 
			    var strLength = str.replace(chineseRegex,"**").length; 
			    for(var i = 0;i < strLength;i++) 
			    { 
			        singleChar = str.charAt(i).toString(); 
			        if(singleChar.match(chineseRegex) != null) 
			        { 
			            newLength += 2; 
			        }     
			        else 
			        { 
			            newLength++; 
			        } 
			        if(newLength > len) 
			        { 
			            break; 
			        } 
			        newStr += singleChar; 
			    }      
			    if(hasDot && strLength > len) 
			    { 
			        newStr += "..."; 
			    } 
			    return newStr; 
			}