[jquery] Call Jquery function

To call the function on click of some html element (control).

$('#controlID').click(myFunction);

You will need to ensure you bind the event when your html element is ready on which you binding the event. You can put the code in document.ready

$(document).ready(function(){
    $('#controlID').click(myFunction);
});

You can use anonymous function to bind the event to the html element.

$(document).ready(function(){
    $('#controlID').click(function(){
         $.messager.show({  
            title:'My Title',  
            msg:'The message content',  
            showType:'fade',  
            style:{  
                right:'',  
                bottom:''  
            }  
        });  
    });
});

If you want to bind click with many elements you can use class selector

$('.someclass').click(myFunction);

Edit based on comments by OP, If you want to call function under some condition

You can use if for conditional execution, for example,

if(a == 3)
     myFunction();