how to find hidden information

Question

hye im newbie here..

im looking for a hidden information in a source code..

for example the code is

var d=document.getElementById('phoneSpan0');d.innerHTML+=0?'0':'0';d.innerHTML+='3';d.innerHTML+=0?'5':'-';d.innerHTML+=1?'7':'0';d.innerHTML+=0?'8':'9';d.innerHTML+='6';d.innerHTML+='8';d.innerHTML+=String.fromCharCode(19+30);d.innerHTML+=1?'8':'6';d.innerHTML+=String.fromCharCode(8+41);d.innerHTML+=1?'8':'3';

the information that i need is numbers. in the web page, the number is situated between

but when i try to find it in the source code, the numbers is not there. i believe the its between the javascript..

my question is, how to get the information between the javascript?..