javascript

JS takes the value of request and executes it automatically using the example

There are three common ways to automate JS functions in web pages In the Head area of HTML, there is the following function:


<SCRIPT LANGUAGE="JavaScript">
functionn MyAutoRun()
{
　//The following is the code of your function, please modify first!
　alert(" The function executes automatically! ");
}
</SCRIPT>

Next, let’s take the above function and let it run automatically when the page loads! The first method Change the above code to:


<SCRIPT LANGUAGE="JavaScript">
functionn MyAutoRun()
{
　//The following is the code of your function, please modify first!
　alert(" The function executes automatically! ");
}
window.onload=MyAutoRun(); //Just add this sentence
</SCRIPT>

The second method Modify the Body of the page to:


<body onLoad="MyAutoRun();">

Or replace it with:


<body onLoad="javascript:MyAutoRun();">

The third way Using JS timer to intermittently execute functions:


setTimeout("MyAutoRun()",1000); //The MyAutoRun() function is executed every 1000 milliseconds

To implement the method, change the top JS function to:


<SCRIPT LANGUAGE="JavaScript">
functionn MyAutoRun()
{
　//The following is the code of your function, please modify first!
　alert(" The function executes automatically! ");
}
setTimeout("MyAutoRun()",1000); //That's it
</SCRIPT>

Other methods are more special, not commonly used, versatility is not big, not introduced! You can also use EL& JSTL in JS


var step = "<c:out value='${step}' default='0'/>";
switch(step) {
case"0":
default:
break; var step = "<c:out value='${step}' default='0'/>";