How check if a textbox contain a value using JavaScript

Abraham Olatubosun

Dear Code Masters,

Greetings to you all and happy Valentine day, love, joy and good health to you all.

Code Masters, i writing a project for my organisation whee we collect data this data's are aggregated before submitting to the server.

So, i want to test each aggregated TextBox if the contain Value then that should be added as well else the current data will be summ to the aggregate TextBox. The code below is it correct Please:

function sumUpHTC20() {
if (isNaN(parseFloat(document.getElementById('<%=TextBox1070.ClientID%>').value))) {
document.getElementById('<%=TextBox1069.ClientID%>').value = parseFloat(document.getElementById('<%=TextBox1070.ClientID%>').value) + 10
} else {
document.getElementById('<%=TextBox1069.ClientID%>').value = parseFloat(document.getElementById('<%=TextBox1070.ClientID%>').value) + parseFloat(document.getElementById('<%=TextBox1071.ClientID%>').value);
}
}

it not working, kindly review.

Thank you all

2 Replies

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Amit Kumar9y ago
Hi Dear,
Using Jquery.
if ( $("#textBoxId").val().trim().length == 0 )
{
// means has not any values do something
}
using javascript use like this.
var textbox = document.getElementById('<%=TextBox1070.ClientID%>');

     if(textbox.value.length == 0)
     {
         //textbox does not contains any value
     }
else{
//textbox has value
}
OR

if(textbox.value == ""){
  //textbox does not contains any value
}
else{
//textbox has value
}
+1
Rathrola Prem Kumar9y ago
Try this..
var textarea = document.getElementById('textareabox');
var word = 'something';
var textValue=textarea.value; //-> don't use .innerHTML since there is no HTML in a textarea element
if (textValue.indexOf(word)!=-1)
{
alert('found')
}

+2