The realization method of using carriage return instead of tab when filling in form _ form effect

The key is TabIndex, the idea is to set a tabindex for each form element, whose value is the value of the tabindex of the previous form element plus one, and the function is to add the current TabIndex value to one when the user presses the ENTER key. The TabIndex values of each form element are then compared to each other, and if they are equal, the focus is moved above the form element.

First, we need to set a onkeyup event in the table monomer:
<form name= "xxx" action= "yyy.asp" method= "POST" onkeyup= "return Changefocus_onkeyup ()" language= "JavaScript" >

Second, set a TabIndex value in each form element, assuming that the form has three elements, we set the TabIndex value as follows:
<input type=text name= "txtname" size= "tabindex=1>"
<input type=checkbox name= "Chksign" tabindex=2>
<textarea name= "Tarcontent" tabindex=3>

Finally, write down the Changefocus function as follows:
function Newinfo_form_onkeyup ()
{
Key=window.event.keycode;
if (key==0xd)//To determine whether to press the ENTER key
{
Curtabindex=event.srcelement.tabindex 1//Add the current TabIndex value to 1
for (N=0;n<newinfo_form.elements.length;n)
{
if (newinfo_form.elements[n].tabindex==curtabindex)//Find the next form element
{
Newinfo_form.elements[n].focus (); Move focus
return true;
}
}
}
}