郑德才博客

过滤空格键

<script>
function trim(inputString) {
               //xiao duan 22/06/2007
              if (typeof inputString != "string") { return inputString; }
              var retValue = inputString;
              var ch = retValue.substring(0, 1);
              while (ch == " ") {
           //检查字符串开始部分的空格
                  retValue = retValue.substring(1, retValue.length);
                  ch = retValue.substring(0, 1);
              }
              ch = retValue.substring(retValue.length-1, retValue.length);
              while (ch == " ") {
                 //检查字符串结束部分的空格
                 retValue = retValue.substring(0, retValue.length-1);
                 ch = retValue.substring(retValue.length-1, retValue.length);
              }
              while (retValue.indexOf("  ") != -1) {
          //将文字中间多个相连的空格变为一个空格
                 retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length);
              }
              return retValue;
           }

//-->
</script>

//过滤特殊字符

function CheckIfEnglish( String )
{
    var Letters = "(!@#$%^&*;':";
     var i;
     var c;
      if(String.charAt( 0 )=='-')
 return false;
      if( String.charAt( String.length - 1 ) == '-' )
          return false;
 for( i = 0; i < String.length; i ++ )
     {
          c = String.charAt( i );
   if (Letters.indexOf( c ) > 0)
    return false;       
     }
     return true;
}