多行文本框长度限制

 

多行文本框长度限制

http://blog.csdn.net/johncools/article/details/1460095

分类： Asp / Asp.net 学习专用2006-12-25 15:10 297人阅读 评论(0) 收藏 举报

function   maxCheck(ele,maxLength)   
              {   
                  var   maxLengh_Bak   =   maxLength;   
                  var   length   =   ele.value.length;   
                  var   i;   
                  for(i=0;i<length;i++)   
                  {   
                    if (/^[/u4E00-/u9FA5]+$/g.test(ele.value.charAt(i)))   
                       {   
                          maxLength=maxLength-2;   
                       }   
                    else   
                       {   
                         maxLength--;   
                       }   
                    if (maxLength<0)   
                      {         
                        alert("长度不能超过"   +   maxLengh_Bak   +   "个字符");   
                        ele.value=ele.value.slice(0,i);   
                        return;       
                  }   
              }       
               return;   
             }

调用： TextBox1.Attributes["onchange"] = "maxCheck(this,10)";