How to Remove All Elements From a JavaScript Array
To remove all the elements from a JavaScript array, simply set the array length to 0, as shown in the following example:
var aryTest = [1,2,3,4];
document.write(aryTest.length);
aryTest.length = 0;
document.write(aryTest.length);
Related articles:
JavaScript Arrays Summary and Reference
JavaScript Array length Property
