IE 和Firefox完全兼容的Tab代替Enter的Javascript代码

声明：该博文转载于博客园：http://www.cnblogs.com/lincats/archive/2008/06/19/1226024.html

 

document.onkeydown=function(evt)
             {
               var isie = (document.all) ? true : false; 
               var key; 
               var srcobj;
               if (isie) 
               {
                 key = event.keyCode; 
                 srcobj=event.srcElement;
                 }
               else 
               {
                 key = evt.which; 
                 srcobj=evt.target;
                 }               
                 if(key==13 && srcobj.type!='button' && srcobj.type!='submit' &&srcobj.type!='reset' && srcobj.type!='textarea' && srcobj.type!='')                 
                 {
                   if(isie)
                   {
                    event.keyCode=9;
                   }
                   else
                   {                        
                     var el=getNextElement(evt.target);
                             if (el.type!='hidden')
                                el.focus(); 
                             else
                                while (el.type=='hidden')
                                   el=getNextElement(el); 
                                el.focus(); 
                             return false;
                   }
                 }
              }                
                function getNextElement (field) {
                   var form = field.form;
                   for (var e = 0; e < form.elements.length; e++) { 
                     if (field == form.elements[e])
                         break;
                   }
                   return form.elements[++e % form.elements.length];
                 }