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jQuery substring function

Posted on 2014-12-08
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Last Modified: 2014-12-09
Hello Experts,

I have this short script below. For some reason only the line with the "substring" function creates and error. The error in the console is very long and looks as if there is a problem with the function. Can it be that i have to declare or convert the variable type before i use the "substring" function? As soon as i remove the "substring(4);" from line 3 in the code below there is no error.

$('.table tr').hover(function() {	
    var floorPlan = $(".td:eq(2)", this).text();		
    var floorImage = $("#viewimage > div").attr("id").substring(4);
    
    $("#viewimage > div img").css("visibility", "hidden");		
    $("#plan"+floorImage).find("img").css("visibility", "visible");

});

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Question by:Refael
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leakim971 earned 500 total points
ID: 40487855
$('.table tr').hover(function() {	
    var floorPlan = $(".td:eq(2)", this).text();		
    var floorImageStr = $("#viewimage > div").attr("id");
    floorImage = (floorImageStr || "").substring(4); // if the ID attribute is not set you get undefined and an error
    $("#viewimage > div img").css("visibility", "hidden");		
    $("#plan"+floorImage).find("img").css("visibility", "visible");

});

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Author Closing Comment

by:Refael
ID: 40490025
leakim971, Thank you. Always!
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