html - javascript textarea value and if -
i utilize next code:
<html> <head> <script type="text/javascript"> function asd(){ var b = document.getelementbyid("txt").value; var c = document.getelementbyid("txt2").value; if( b > c ){alert("the first value more sec value");} } </script> </head> <body> <textarea id="txt"></textarea> <input type="button" value="click me" onclick=asd()> <br> <textarea id="txt2"></textarea> </body> </html> but codes work incorrectly. writing firs textarea, 5. i'm writng scnd textarea , 40. , alarm works. ı dont understand. searched , find solution.
if( parseint(b,10)) > (parseint(c,10)) ) so why has failed first time?
it failed first time because numbers parsed strings.
var b = document.getelementbyid("txt").value; //b = "5" var c = document.getelementbyid("txt2").value; // c = "40" if( b > c ){ // "5" > "40" false because browser not understand this. alert("the first value more sec value"); } if utilize parseint strings parsed integer.
so:
var b = document.getelementbyid("txt").value; //b = "5" var d = parseint(b); // d = 5 the 'is greater/less than' sign work integers ( , floats etc.) not strings. that's why if-statement returned false.
javascript html
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